Python 入门日记（七）—— 用户输入和 while 循环

2020.07.13 Python 入门的 Day6

成就：用户输入和 while 循环

• 函数 input() 可用于读入字符串，使用 input() 读入的数据都被视作字符串。

message = input("Tell me something, and I will repeat it back to you: ")
print(message)
# Tell me something, and I will repeat it back to you: lbwnb
# lbwnb

prompt = "If you tell us who you are, we can personalize the messages you see."
prompt += "
What is your first name?"
name = input(prompt)
# If you tell us who you are, we can personalize the messages you see.
# What is your first name?lbw
# >>name:" lbw

• 如果要读入整数类型，需要读入字符串之后强制类型转换；要读入浮点数也同理。
• 但如果格式不对，编辑器会报错。

age = input()
age = int(age)
# 读入整数
age = float(age)
# 强制转换成浮点数

• while 循环格式如下：

counter_number = 1
Active = True

while Active:
    counter_number += 1
    if counter_number >= 100:
        Active = False
    if counter_number == 89:
        break

• break、continue 的使用与 C 语言一样。